1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
from django.db import models
class TimelineEvent(models.Model):
"""
Something that has happened to an identity that we want them to see on one
or more timelines, like posts, likes and follows.
"""
class Types(models.TextChoices):
post = "post"
boost = "boost" # A boost from someone (post substitute)
mentioned = "mentioned"
liked = "liked" # Someone liking one of our posts
followed = "followed"
boosted = "boosted" # Someone boosting one of our posts
# The user this event is for
identity = models.ForeignKey(
"users.Identity",
on_delete=models.CASCADE,
related_name="timeline_events",
)
# What type of event it is
type = models.CharField(max_length=100, choices=Types.choices)
# The subject of the event (which is used depends on the type)
subject_post = models.ForeignKey(
"activities.Post",
on_delete=models.CASCADE,
blank=True,
null=True,
related_name="timeline_events",
)
subject_post_interaction = models.ForeignKey(
"activities.PostInteraction",
on_delete=models.CASCADE,
blank=True,
null=True,
related_name="timeline_events",
)
subject_identity = models.ForeignKey(
"users.Identity",
on_delete=models.CASCADE,
blank=True,
null=True,
related_name="timeline_events_about_us",
)
created = models.DateTimeField(auto_now_add=True)
class Meta:
index_together = [
# This relies on a DB that can use left subsets of indexes
("identity", "type", "subject_post", "subject_identity"),
("identity", "type", "subject_identity"),
]
### Alternate constructors ###
@classmethod
def add_follow(cls, identity, source_identity):
"""
Adds a follow to the timeline if it's not there already
"""
return cls.objects.get_or_create(
identity=identity,
type=cls.Types.followed,
subject_identity=source_identity,
)[0]
@classmethod
def add_post(cls, identity, post):
"""
Adds a post to the timeline if it's not there already
"""
return cls.objects.get_or_create(
identity=identity,
type=cls.Types.post,
subject_post=post,
)[0]
@classmethod
def add_mentioned(cls, identity, post):
"""
Adds a mention of identity by post
"""
return cls.objects.get_or_create(
identity=identity,
type=cls.Types.mentioned,
subject_post=post,
subject_identity=post.author,
)[0]
@classmethod
def add_post_interaction(cls, identity, interaction):
"""
Adds a boost/like to the timeline if it's not there already.
For boosts, may make two objects - one "boost" and one "boosted".
It'll return the "boost" in that case.
"""
if interaction.type == interaction.Types.like:
return cls.objects.get_or_create(
identity=identity,
type=cls.Types.liked,
subject_post_id=interaction.post_id,
subject_identity_id=interaction.identity_id,
subject_post_interaction=interaction,
)[0]
elif interaction.type == interaction.Types.boost:
# If the boost is on one of our posts, then that's a boosted too
if interaction.post.author_id == identity.id:
return cls.objects.get_or_create(
identity=identity,
type=cls.Types.boosted,
subject_post_id=interaction.post_id,
subject_identity_id=interaction.identity_id,
subject_post_interaction=interaction,
)[0]
return cls.objects.get_or_create(
identity=identity,
type=cls.Types.boost,
subject_post_id=interaction.post_id,
subject_identity_id=interaction.identity_id,
subject_post_interaction=interaction,
)[0]
@classmethod
def delete_post_interaction(cls, identity, interaction):
if interaction.type == interaction.Types.like:
cls.objects.filter(
identity=identity,
type=cls.Types.liked,
subject_post_id=interaction.post_id,
subject_identity_id=interaction.identity_id,
).delete()
elif interaction.type == interaction.Types.boost:
cls.objects.filter(
identity=identity,
type__in=[cls.Types.boosted, cls.Types.boost],
subject_post_id=interaction.post_id,
subject_identity_id=interaction.identity_id,
).delete()
|
